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The revised Shimano Ultegra Di2 ST-R8170 brake levers with BR-R8170 brake calliper impress with new ergonomics and even more precise brake modulation thanks to SHIMANO's proven SERVO WAVE technology. Wireless electronic shifting ensures even more control.
Great speed means great responsibility. For this reason, when faced with the task of making the new ULTEGRA group even faster, Shimano has opted for a holistic and 100% performance-oriented approach. The new 12-speed road bike group scores points with unparalleled control and comfort anytime and anywhere - whether in a race for amateurs, chasing a personal best or on a friendly ride. That's "Science of Speed". And it's what sets SHIMANO apart from others.
The hydraulic 2-piston brake calliper BR-R8170 offers flat mount and L03A resin disc pads with cooling fins. The completely redesigned ULTEGRA BR-R8170 brings a new level of control to the road bike world, with optimized modulation and unprecedented braking power. The new design minimizes brake judder. In addition, the new system is quieter and easier to maintain than ever before, despite its compact size.
Features
FASTEST AND MOST RELIABLE SHIFTING EVER
Improved aerodynamics - Revised DUAL CONTROL shift/brake levers with raised and rounded brake handles
The drive can be adapted to the rider's preferences via the E-TUBE app
Among other things, the shifting speed can be set, a fully or semi-synchronous shifting mode can be selected and the program buttons on the shift lever can be assigned certain functions
Wireless where it counts
SHIMANO's self-developed, extremely safe Di2 wireless chip scores with low probability of interference, unrivalled processing speed and lower energy consumption
Fastest shifting processes at the front and rear
Quieter and easier to maintain brake components
Outstanding brake control
Excellent heat dissipation
Easy wheel change
Simple, clean venting system
Easy adjustment and maintenance
High energy efficiency
Battery life: 1.5 to 2 years with easily replaceable CR1632 batteries in the gearshift/brake levers_
Technical data
Type: Dual-Control (STI)
Mounting: left
Rear gears: 12-way
Optical gear display: no
Grip width adjustment: Yes
Handlebar diameter: 23.8mm/24.2mm
Brake type: Hydraulic disc brake system (disc brake)
Brake caliper: BR-R8170
Brake caliper mount: Flat-Mount
Brake pad: L03A resin with cooling fins
Brake line: SM-BH90-JK-SSR rear 1700mm (can be shortened)
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